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what method should be used to prepare photos for displaying via Apple TV to a 4k televise to ensure smallest fie that will give #1
Gordon 's picture
by Gordon
November 24, 2014 - 4:30pm

I appreciate that for exporting to a retina iPad to get best picture you are supposed to use a preset of “to fit within 2048 x 2048 pixels at 264 dpi.

What should the settings be with a 4k tv please.


Thomas Emmerich's picture
by Thomas Emmerich
November 25, 2014 - 5:28am

Theoretically 4096 x 4096.


Gordon 's picture
by Gordon
November 25, 2014 - 2:45pm

Thanks - that’s what I thought. BUT…… I compared photos exported. With these settings:
1. 800 x 1200 at 300 dpi
2. 4000 x 3000 at 240 dpi
3. 8000 x 6000 at 240 dpi
I could see no difference on screen so what is going on here? Is the important thing the dpi figures I have used? A 4K tv that is say 40” wide and had 4000 pixels would have 4000\40=100 dpi and since the files are at dpi greater than 100 then this is controlling the picture quality at maximum however many pixels I used in the set up before exporting?
Clearly I am probably confusing myself and don’t have an adequate understanding of what is needed!


Kodora's picture
by Kodora
November 25, 2014 - 6:46pm

Current generation Apple TV doesn’t support 4k output?

Kodora's picture
by Kodora
November 25, 2014 - 6:52pm

Btw, dpi doesn’t mean anything when you have the picture size defined by number of pixels.

Gordon 's picture
by Gordon
November 25, 2014 - 7:46pm


Thanks for your response.  The photos were exported to a usb memory stick so Apple TV not involved.  So I am left puzzled still.  Can anyone offer any further guidance please?


Philippe's picture
by Philippe
December 10, 2014 - 10:48am

This is a complex topic, one that needs thorough reading in order to understand what a pixels and dots per inch mean, how they compare in the industry (print, computer screen vs TV) so a couple of links should get you going. One thing to take not of is that computer screen pixels are usually/mostly square and pixels on a TV are rectangle.


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